Intravenous-injection apparatus.



J. L. OWENS. INTRAVENOUS INJECTION APPARATUS. APPLIUATIONQILED MAR. 10, 19 13.

1,084,? 58, A Patented Jan.20,1914

WMJAIIAZWIAII JLav flw incense.

llNITED STATES PATENT OFFICE;

uosnrn nnnms owns, or KANSAS CITY, ivns'souhi.

iiif'ir'nAifniiousinfrn-etion APPARhrUs.

Specification of letters Patent. f Kopnceuon fi-Ietl March 10,1913. Sei'ial No. wages.

Patented Jan. 2c, 1911..

s'idifig at Kansa City, in the county of- J'ackson and State of Missouri, have invented certain new and useful Improvements in Intravenous Injection App ratus, of which the following is a specification.

This invention relates to apparatus ton intravenous injections designed for use in surgery in connect-ion with treatments 1'nvolving the injectioll of solutions into the veins, for example in the treatment of malaria, and my object is 'to iodiiee a device f of this character whereby t e operator may at all times know Whether or not the soluber tube 24. Tubes 18, 20, end 24 are protion is being discharged into e vein.

A further object is the construction of appaiatus in which the needle tube will be protected against the ehtl anee of any foreign particles elon g with the solution esit passes into the tube so that only the clear solution will arrive at the needle.

Another object aimed at is it device so collstructed that in its use the oper' tor may always 'obs'e'rve and accurately estimate the qunhtity 0t fluid which is passing through the needle.

A tutthei object is the roduction of such an apparatus in a fonm in which the how of the solutionyvill alway be steady and const'ahjtes well as subject to regulation at all tithes by the operator.

With these the other objects in View as will a ear in the course of the description; my invention comprises certain details and combinations of parts which 1 will roceed glass tubes.

to describe in ronnection with one embodiment '01" form that my invention is adapted to take, and for a full understandin theieof, reference is to be had to the ec'compeny ,ihg drewi g in which- Figure 1 1s a side elevation of the appe i-a'tu's mounted ready for use. big. 2, is a hot'iz'ontal section along the line 11-11 of Fig. l, and Fig. 3, is a broken vertical section through the lower end of one of the Referring to the drawing two separate glass tubes 2 and 4 are usedfor holding the necessary solutions, the tube 2 being an indicator tube to be filled with a normal salt solution or pure sterilized Water, and the tube 4, being a graduated tube, as shown to be filled with a solution to be injected through the lntr'e'tv'eliOus needle 6. Extnd- Warcl from the bottom of the tube 2, providing an inlet opening 8 and tenninhting preferably in an upper return-bend with a constricted end havin a small openin 12,

j communicating with t e interior ottu e 2.

The tube 4 has a central opening through its bottom, formed by a short tube 16 extending upward irom the bottom an inch or so for a purpose which is hereinafter explained. The lower 'ends of the tubes 14: and

16 are connected by rubber tubes 18 and 20 m to a three-way conneetionQQ, which communicates with the needle 6 through a rubvided respectively with pinch clamps 26 28 and 30f For suitably supporting the glass 5 tubes 2 end 4 in the-rings 32, of it stand 3 1,

the tubes are formed hear their u per ell'ds with ribs or shoulders .36 for engagin the upper surfaces of said rings, the state being also provided with rings 38, for steetly- 30 ping the lower ends of the tubes.

Upon the ll'pp'ei' ends of the glass tubes are formed reduced hollow extensions 40 and 42 as shown, these extensions being ground and of a diameter to ht the innei 35 ing understood that the rubber tubes 18 and 20 are meanwhile closed by their clamps. The tube 4, is likewise filled with the solution to'be injected; and as this solution is often prepared tremisubstances which are not reediiy soluble, so much so that glass beads are employed in preparing the solution, it

fre uently happens that undi'ssolved pan ticles and even fine pieces of the bends will settle and collect at the bottomof tube 4.

Consequently to guard against such solid particles entering the tube 20 and assing' with the clear solution to the'n'eedle, t e tube 16 xtends up from the bottom of tube 4: so as to present its mouth at a safe distance above any deposits of this character. Then the tubes 2 and 4 are both placed in the stand 34 and the cap it applied. Now the tube paratus for use, the 90 to receive the injection; As the fluid leaves either of the glass tubes air must of course enter at the opening 8 to replace it, and the rate of flow from the tubes and hence.

through the needle, may be accurately esti mated fromthe rate at which the'bubbles 3 form at the opening 12 and pass through the indicator tube 2 to the air space in the cap 44. Unless the needle is properly located with its opening squarely in the vein it will be understood that the flow through it will not take place freely and consequently the bubbles in the indicating tube will rise at a correspondingly slow rate but as soon as the needle is positioned squarely in the vein the flow will be rapid and the rise of air bubbles accelerated accordingly. This proper position of the needle is secured before any of the solution in tube 4 is allowed to fiow into the tube 20, because of the irritating eifect which frequently results from the escape of the medicated solution into the tissues, whereas the plain solution will not have such disagreeable effect. After the needle has been properly located, the clamp 26 is closed and tube 20 opened for the discharge of the solution from tube 4, which can thereafter be regulated by means of either of the clamps 28 or 30.--

A steady flow from the solution tubes is gained by the peculiar construction of the air inlet tube 10 having the constricted and referably curved upper end communicating through a small opening 12 with the interior of the .tube 2. I have found by experiment that so long as the tube 10 is of uniform diameter throughout, some liquid will be forced out through it, no matter how small the diameter may be. This is due to differences in pressure at slight intervals over the columns of liquid in tubes 2 and 4 as air enters the one and liquid leaves the other, and the result is a pumping action in tube 2 so long as a tube 10 of uniform diameter is used, so that the liquid is gradually forced out at the opening 8, and the pumping action increases as the volume of air is increased while the flow from the needle tube is also materially aifected. This fault, however, I find to becompletely cured by the .curved and constricted form of the tube 10 which I have illustrated, and which I would explam as having a sort ;of nozzle eflect whereby air is enabled to enter the tube 2 with suflicient pressure to support the liquid against the reaction under any slight variations in the pressure above. IAS a conseuence no water whatever escapes through t e tube 10 and the flow thropgh the tubes 18 and 20 is maintained absolutely steady and uniform.

While the above represents what I regard as the preferred form of my device, the same is of course susceptible of various modifications for example, the air inlet tube 10 and the liquid discharge tube 16 can be used in connection with a single glass tube 4, though I find currents are sometimes estab lished which are objectionable as disturbing the deposits at the bottom of the tube. However, I desire to reserve to myself the right to all such changes and modifications as may properly fall within the scope of the follow- V ing claims. L

I claim- 1. In a device of the character described, a liquid receptacle, an air inlet tube and a liquid discharge tube both communicating with said receptacle, said discharge tube being positioned to allow escape of the liquid from the receptacle by gravity, said air inlet tube having an air receiving opening and a constricted air-discharge opening for supplying air to said receptacle to replace the liquid as discharged.

2. In a device of the character described, a liquid receptacle, an air inlet tube and a liquid discharge tube both communicating with said receptacle, said discharge tube being positioned to allow escape of the liquid from the receptacle by gravity, said air inlet tube'having an air receiving opening and a constricted air discharge opening for supplying air to said receptacle to replace the liquid as discharged, and said liquid discharge tube having its receiving opening spaced above the bottom of said receptacle. '3. In an apparatus for intra-venous injections, a hq'uid receptacle having two liquid compartments communicating with each other through a sealed air compartment, one of said liquid compartments having an air inlet opening and the other liquid compartment having a li uid discharge opening.

4. An apparatus or int-ra-venous in ections comprising a liquid receptacle having two' liquid 1 compartments communicating with each other through an air compartment, one of said liquid compartments having an air inlet tube provided with an air receiving opening and a constricted air discharge opening, and the other liquid compartment having a liquid discharge opening.

5. An apparatus for intra-venous injections comprising'a liquid receptacle having two liquid compartments communicating with each other through an air comgnrb inlet opening, and a needle tube having branches connected with both of said discharge openings.

6. An apparatus for intra-venous injections comprising a'liquid receptacle having two" liquid compartments communicating with each other through an air compartment, each of the liqui compartments having a liquid discharge opening and one of the liquid compartments having also an air inlet tube provided with an air receiving opening and a. constricted air discharge opening, and connected with both of said liquid discharge openings.

7. An apparatus for intra-venous injec tions com risin an indicator tube for holding liqui sai tube having a liquid distending throug aneedle tube having branches charge opening an air inlet tube projecting upward from the bottom of said indicator tube and having a constricted innerend, a solution holding tube, a discharge tubeexand above the bottom of said solution tube, an inverted U-sha'ped air tube joining the" to solution tubes and orming an air-tight connection between them, and having branches connected with] said discharge opening and said discharge tube.

In testimony whereof 'I aflix my signature in presence of two witnesses.

, JOSEPH LANDIS OWENS.

Witnesses:

CHAS. GERARD, G. Y. Tnonrn.

s of said indicator and a needle tube 

